(update) - update all lib + support for sp app page

[PooLP]

Little update with update for all lib + support for SharePoint appPage.

For other bug, i see if have a time for this.

Please do not use anymore unmaintainable and useless deployment system ;) I tried to correct the deployment system, but after a afternoon, i give up.

On my tenant, only AppPage version work, the WebPart item do not appear in list of webpart in content page. Bizarre.

[PooLP]

New little update : Update to SPFx 1.12.1 Add spfx fast serve Corrected sitePicker

@ypcode, @VesaJuvonen, @JarbasHorst this project is abandoned? do you know if Microsoft will update the JSON schema of the siteDesign / sitescript with new (but old) option (minimal header, extended header ...)?