[FEATURE] Localization, adds multi-language support

[Lissy93]

Category: Feature

Overview
I think that it is important for everyone to be able to comfortable use Dashy, even if English is not their native language.
This PR implements the language-switching functionality. All text within the application has been extracted to a single locales file, and this file can then be duplicated and translated into other languages.

Unfortunately, at this time I wasn't able to include any other language, since I only speak English 😞 but now that the functionality is in place, I can look into getting it translated very easily :)

Issue Number N/A

New Vars
The only new variable is appConfig.language, an optional property to pre-load a given language. The language can also be updated through the UI once the app is running.

Field	Type	Required	Description
language	string	Optional	The 2 (or 4-digit) ISO 639-1 code for your language, e.g. en or en-GB. This must be a language that the app has already been translated into. If your language is unavailable, Dashy will fallback to English. By default Dashy will attempt to auto-detect your language, although this may not work on some privacy browsers.

Screenshot N/A

Code Quality Checklist (Please complete)

• All changes are backwards compatible
• All lint checks and tests are passing
• There are no (new) build warnings or errors
• (If a new config option is added) Attribute is outlined in the schema and documented
• (If a new dependency is added) Package is essential, and has been checked out for security or performance

[netlify]

✔️ Deploy Preview for dashy-dev ready!

🔨 Explore the source changes: 51641d0

🔍 Inspect the deploy log: https://app.netlify.com/sites/dashy-dev/deploys/60fd5bbbae6e380007b81372

😎 Browse the preview: https://deploy-preview-99--dashy-dev.netlify.app/

[github-actions]

yarn.lock changes

Summary

Status	Count
	93
	10
	1

Click to toggle table visibility

Name	Status	Previous	Current
@architect/asap		-	3.13.8
@architect/create		-	1.4.3
@architect/hydrate		-	1.10.2
@architect/inventory		-	1.4.4
@architect/parser		-	3.0.1
@architect/sandbox		-	3.7.4
@architect/utils		-	2.1.3
@begin/hashid		-	1.0.0
@sindresorhus/is		-	0.14.0
@szmarczak/http-timer		-	1.1.2
abstract-leveldown		-	6.2.3
acorn-loose		-	8.1.0
acorn		7.4.1	8.4.1
ansi-align		-	3.0.0
aws-sdk		-	2.880.0
boxen		-	5.0.1
buffer-crc32		-	0.2.13
buffer		4.9.2	5.7.1
cacheable-request		-	6.1.0
ci-info		1.6.0	2.0.0
cli-boxes		-	2.2.1
clone-response		-	1.0.2
configstore		-	5.0.1
cpr		-	3.0.1
crypto-random-string		-	2.0.0
decompress-response		-	3.3.0
deep-extend		-	0.6.0
defer-to-connect		-	1.1.3
deferred-leveldown		-	5.3.0
defined		-	0.0.0
depstatus		-	1.1.1
dotenv		8.6.0	10.0.0
duplexer3		-	0.1.4
dynalite		-	3.2.1
encoding-down		-	6.3.0
escape-goat		-	2.1.1
global-dirs		-	3.0.0
got		-	9.6.0
has-yarn		-	2.1.0
http-cache-semantics		-	4.1.0
immediate		-	3.2.3
import-lazy		-	2.1.0
ini		-	1.3.8
is-ci		1.2.1	2.0.0
is-installed-globally		-	0.4.0
is-npm		-	5.0.0
is-path-inside		2.1.0	3.0.3
is-yarn-global		-	0.3.0
json-buffer		-	3.0.0
keyv		-	3.1.0
latest-version		-	5.1.0
lazy		-	1.0.11
level-codec		-	9.0.2
level-concat-iterator		-	2.0.1
level-errors		-	2.0.1
level-iterator-stream		-	4.0.2
level-option-wrap		-	1.1.0
level-supports		-	1.0.1
leveldown		-	5.6.0
levelup		-	4.4.0
lock		-	1.1.0
lowercase-keys		-	2.0.0
ltgt		-	2.2.1
memdown		-	5.1.0
mimic-response		-	1.0.1
napi-macros		-	2.0.0
node-gyp-build		-	4.1.1
node-watch		-	0.7.1
normalize-url		3.3.0	4.5.1
p-cancelable		-	1.1.0
package-json		-	6.5.0
path-sort		-	0.1.0
prepend-http		1.0.4	2.0.0
pupa		-	2.1.1
queue-microtask		-	1.2.3
rc		-	1.2.8
reachdown		-	1.1.0
registry-auth-token		-	4.2.1
registry-url		-	5.1.0
responselike		-	1.0.2
router		-	1.3.5
run-parallel		-	1.2.0
run-series		-	1.1.9
run-waterfall		-	1.1.7
semver-diff		-	3.1.1
server-destroy		-	1.0.1
setprototypeof		1.1.1	1.2.0
sha		-	3.0.0
strip-json-comments		3.1.1	2.0.1
subleveldown		-	5.0.1
symlink-or-copy		-	1.3.1
to-readable-stream		-	1.0.0
tree-kill		-	1.2.2
typedarray-to-buffer		-	3.1.5
unique-string		-	2.0.0
update-notifier		-	5.1.0
url-parse-lax		-	3.0.0
vue-i18n		-	8.25.0
widest-line		-	3.1.0
write-file-atomic		-	3.0.3
ws		6.2.2	7.5.3
xdg-basedir		-	4.0.0
xml2js		-	0.4.19
xmlbuilder		-	9.0.7