feat: add Property binding resource support to SDK

[ionmincu]

Summary

• Adds sdk.bindings.get_property(key, sub_property?) — a generic API for reading connector-defined Property binding values from bindings.json at runtime
• Extends BindingResourceValue with optional description and propertyName fields present in Property bindings
• Adds PropertyResourceOverwrite to the resource overwrite discriminated union so runtime overwrites work for Property resources
• Documents Property as the 7th resource type in bindings.spec.md
• Replaces the need for user-maintained helpers like the get_binding_property() function seen in vertical solutions

Changes

• runtime_schema.py — BindingResourceValue gains optional description / propertyName fields
• _bindings.py — new PropertyResourceOverwrite class; added to ResourceOverwriteUnion
• _bindings_service.py (new) — BindingsService.get_property() reads bindings.json, supports exact and suffix key matching, and honours runtime overwrites via the existing _resource_overwrites ContextVar
• _uipath.py — exposes sdk.bindings as a cached_property
• bindings.spec.md — full documentation for the Property resource type including key format, value structure, metadata fields, and SDK usage examples
• test_property_bindings.py (new) — 13 unit tests covering happy paths, suffix matching, runtime overwrites, and error cases

Test plan

• All 1636 existing tests pass
• 13 new unit tests for BindingsService and PropertyResourceOverwrite
• Suffix key matching verified
• Runtime overwrite path verified
• KeyError raised for unknown keys and sub-properties

Development Packages

uipath-platform

[project]
dependencies = [
  # Exact version:
  "uipath-platform==0.1.8.dev1014865578",

  # Any version from PR
  "uipath-platform>=0.1.8.dev1014860000,<0.1.8.dev1014870000"
]

[[tool.uv.index]]
name = "testpypi"
url = "https://test.pypi.org/simple/"
publish-url = "https://test.pypi.org/legacy/"
explicit = true

[tool.uv.sources]
uipath-platform = { index = "testpypi" }

uipath

[project]
dependencies = [
  # Exact version:
  "uipath==2.10.29.dev1014865567",

  # Any version from PR
  "uipath>=2.10.29.dev1014860000,<2.10.29.dev1014870000"
]

[[tool.uv.index]]
name = "testpypi"
url = "https://test.pypi.org/simple/"
publish-url = "https://test.pypi.org/legacy/"
explicit = true

[tool.uv.sources]
uipath = { index = "testpypi" }