Apply pertag to work with singletagset

Merge branch 'patch/sticky' into patch/singletagset-sticky

Merge branch 'v0.6-a/patched-base' into v0.6-a/patched-keycodes

Merge branch 'patch/singletagset-pertag' into v0.6-a/patched-base

Apply pertag to work with singletagset

Merge branch 'v0.6-a/patched-base' into v0.6-a/patched-keycodes

Merge branch 'patch/focusnthclient' into v0.6-a/patched-base

Focus nth client

Merge branch 'v0.6-a/keycodes-modes' into v0.6-a/patched-keycodes

Merge branch 'patches/bottomstack' into v0.6-a/patched-base

Merge branch 'patch/namedscratchpads' into v0.6-a/patched-base

Merge branch 'patch/ipc' into v0.6-a/patched-base

Merge branch 'patch/swallow' into v0.6-a/patched-base

Merge branch 'patch/movestack' into v0.6-a/patched-base

Merge branch 'patch/centeredmaster' into v0.6-a/patched-base

feat: access nth monitor

Fix modes code to support keycodes patch

Merge remote-tracking branch 'modes/v0.5/modes' into v0.6-a/keycodes-modes

add bstack and bstackhoriz layouts

implement centeredmaster layout

inspiration: https://github.com/djpohly/dwl/wiki/centeredmaster