Add private-endpoint-webapp example

[MCKLMT]

Contributing a Pull Request

If you haven't already, read the full contribution guide. The guide may have changed since the last time you read it, so please double-check. Once you are done and ready to submit your PR, run through the relevant checklist below.

Contributing to documentation

• The contribution does not exist in any of the docs in either the root of the docs directory or the specs

Contributing an example

• I have checked that there is not an equivalent example already submitted
• I have resolved all warnings and errors shown by the Bicep VS Code extension
• I have checked that all tests are passing by running dotnet test
• I have consistent casing for all of my identifiers and am using camelCasing unless I have a justification to use another casing style

Contributing a feature

• I have opened a new issue for the proposal, or commented on an existing one, and ensured that the bicep maintainers are good with the design of the feature being implemented
• I have included "Fixes #{issue_number}" in the PR description, so GitHub can link to the issue and close it when the PR is merged
• I have appropriate test coverage of my new feature

[codecov-io]

Codecov Report

Merging #1296 (44337ff) into main (b9dc190) will increase coverage by 0.45%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##             main    #1296      +/-   ##
==========================================
+ Coverage   94.57%   95.02%   +0.45%     
==========================================
  Files         341      337       -4     
  Lines       17231    17083     -148     
  Branches       14        0      -14     
==========================================
- Hits        16296    16233      -63     
+ Misses        935      850      -85     

Flag	Coverage Δ
dotnet	95.02% <ø> (-0.09%)	⬇️
typescript	?

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
...cep.Core.UnitTests/FileSystem/FileResolverTests.cs	79.31% <0.00%> (-20.69%)	⬇️
.../Bicep.Core.UnitTests/Assertions/BaselineHelper.cs	63.63% <0.00%> (-15.91%)	⬇️
src/Bicep.Core.UnitTests/Utils/CompilerFlags.cs	20.00% <0.00%> (-13.34%)	⬇️
src/Bicep.Core/FileSystem/PathHelper.cs	96.15% <0.00%> (-3.85%)	⬇️
...Bicep.Core.UnitTests/FileSystem/PathHelperTests.cs	100.00% <0.00%> (ø)
src/vscode-bicep/src/utils/logger.ts
src/vscode-bicep/src/language/client.ts
src/vscode-bicep/src/extension.ts
src/vscode-bicep/src/utils/telemetry.ts