WIP: [Adding Specification for the Adaptive Profile]

specification/under_development/profiles/Adaptive_Hardware/providers.md

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+# Back End Support for Adaptive Profile
+The following table contains rows listing of each optional feature in the adaptive profile via [module flags](../Adaptive_Profile.md#module-flags-metadata)
+as described in the [program structure](../Adaptive_Profile.md##program-structure), and
+columns with hardware providers using the adaptive profile to indicate whether or not they support each feature via a ✓ or x.
+
+|                         | Quantinuum                              | Placeholder Backend 1 | Placeholder Backend 2 | Placeholder Backend 3 |
+| :-----------------------| :---------------------------------------| :---------------------| :---------------------| :---------------------|
+| qubit_resetting         | ✓ | ? | ? | ? |
+| classical_ints          | ✓ (\*constant denominators for div/rem) | ? | ? | ? |
+| classical_floats        | x | ? | ? | ? |
+| classical_fixed_points  | x | ? | ? | ? |
+| user_functions          | x | ? | ? | ? |
+| dynamic_float_args      | x | ? | ? | ? |
+| extern_functions        | ✓ (\*via web assembly) | ? | ? | ? |
+| backwards_branching     | x | ? | ? | ? |
+
+For now, only the Quantinuum support is specified above, but other providers should put in pull requests.
+When a change to add more functionality is publicly available from a provider or to add a provider's description of support for the adaptive profile,
+then a pull request should be made by the provider to update the above table.
+
+