CI: improve release workflow

adapt weekly build workflow to do normal releases too, rename accordingly
skip macos singning setup if certificate not available (useful to run on forks)
add missing dmgbuild dependency for badge icons on macos
build windows installer in workflow, add needed dependencies to pixi.toml
reorganize packaging scripts that can be useful outside rattler-build too
do some cleanup
add .gitignore to rattler-build
Properly configure appimage updating depending on release type and upload zsync file

package/scripts/write_version_info.py

@@ -0,0 +1,51 @@
+#!/usr/bin/env python
+
+# call this file from within the FreeCAD git repo
+# this script creates a file with the important version information
+import os
+import sys
+import subprocess
+
+sys.path.append(f"{os.getcwd()}/src/Tools")
+import SubWCRev
+
+gitInfo = SubWCRev.GitControl()
+gitInfo.extractInfo("","")
+
+i = open("src/Build/Version.h.cmake")
+content = []
+for line in i.readlines():
+	line = line.replace("${PACKAGE_WCREF}",gitInfo.rev)
+	line = line.replace("${PACKAGE_WCDATE}",gitInfo.date)
+	line = line.replace("${PACKAGE_WCURL}",gitInfo.url)
+	content.append(line)
+
+with open("src/Build/Version.h.cmake", "w") as o:
+	content.append('// Git relevant stuff\n')
+	content.append('#define FCRepositoryHash   "%s"\n' % (gitInfo.hash))
+	content.append('#define FCRepositoryBranch "%s"\n' % (gitInfo.branch))
+	o.writelines(content)
+
+with open("src/Tools/SubWCRev.py", "r") as f:
+	new_subwcrev = f.read()
+	new_subwcrev = new_subwcrev.replace("lines = i.writeVersion(lines)",
+		"#lines = i.writeVersion(lines) # this source package already has git info, we do nothing here")
+
+with open("src/Tools/SubWCRev.py", "w") as f:
+	f.writelines(new_subwcrev)
+
+with open(os.sys.argv[1], "w") as f:
+	f.write(f"rev_number: {gitInfo.rev}\n")
+	f.write(f"branch_name: {gitInfo.branch}\n")
+	f.write(f"commit_date: {gitInfo.date}\n")
+	f.write(f"commit_hash: {gitInfo.hash}\n")
+	f.write(f"remote_url: {gitInfo.url}\n")
+
+p = subprocess.Popen(["git", "-c", "user.name='github-actions[bot]'", "-c",
+	"user.email='41898282+github-actions[bot]@users.noreply.github.com'", "commit", "-a", "-m",
+	"add git version information"], stdout=subprocess.PIPE, stderr=subprocess.PIPE)
+
+out, err = p.communicate()
+
+print(out.decode())
+print(err.decode())