Recover and publish documentation managed by the `shfbproj` projects

[mpostol]

Scope and workflow

• [x] PR32-ModelDesigner
• [x] PR21-CommServer
• [x] PR26-DataPorter_Help
• [x] PR30-OPCViewer_Help
• [x] Help
• [x] OPCUAebook
• [x] PR33-CommServerUA
• [x] Tools
• [x] CommonDocumentation

Dependences

• blocker for #3
• it fixes #6
• contributes to mpostol/cas.internal#64.

[mpostol]

PR32-ModelDesigner works, no changes required

[mpostol]

PR21-CommServer - works as expected - no changes required.

[mpostol]

PR33-CommServerUA - the documentation has broken links

[mpostol]

Done or moved to separate issues.