* decentralizing page url-params management -- PoC / tsc 4.1 random fixes
Signed-off-by: Roman <ixrock@gmail.com>

* fixes, tweak example-extension for demo
Signed-off-by: Roman <ixrock@gmail.com>

* lint fixes, revert tests
Signed-off-by: Roman <ixrock@gmail.com>

* removed occasional changes related to typescript 4.1
Signed-off-by: Roman <ixrock@gmail.com>

* updated example with 2 menu-items targeting same page with different params
Signed-off-by: Roman <ixrock@gmail.com>

* fix: merge page url chunks with native URL()-api, simplified default page-params registration
Signed-off-by: Roman <ixrock@gmail.com>

* fix: make lint happy
Signed-off-by: Roman <ixrock@gmail.com>

* fix: unit-tests
Signed-off-by: Roman <ixrock@gmail.com>

* renaming by jim's request: UrlParam => PageParam (type), createUrlParam => createPageParam (helper)
Signed-off-by: Roman <ixrock@gmail.com>

* fix: reverting NamespaceStore public-api breaking changes
Signed-off-by: Roman <ixrock@gmail.com>

* lint fix
Signed-off-by: Roman <ixrock@gmail.com>

* fine-tuning
Signed-off-by: Roman <ixrock@gmail.com>

* yes, lint always unhappy
Signed-off-by: Roman <ixrock@gmail.com>

* fix build
Signed-off-by: Roman <ixrock@gmail.com>

* small fixes
Signed-off-by: Roman <ixrock@gmail.com>

* fix merge-conflicts
Signed-off-by: Roman <ixrock@gmail.com>

* removed `isSystem` page-param's init field exposed to extensions-api
Signed-off-by: Roman <ixrock@gmail.com>