Revert "Drop parking_lot_core git patch and tkinter deps"

Tag 0.6.0 keeps that removal. This restores the parking_lot_core
git patch and the tkinter dependencies on main.

Assisted-by: Grok:4.7

Cargo.toml

@@ -31,6 +31,7 @@ ssl-rustls-aws-lc = ["ssl-rustls", "dep:rustls", "rustls/aws_lc_rs"]
 ssl-rustls-aws-lc-fips = ["ssl-rustls-aws-lc", "rustls/fips"]
 ssl-openssl = ["ssl", "rustpython-stdlib/ssl-openssl"]
 ssl-openssl-vendor = ["ssl-openssl", "rustpython-stdlib/ssl-openssl-vendor"]
+tkinter = ["rustpython-stdlib/tkinter"]
 
 [build-dependencies]
 winresource = "0.1"
@@ -128,7 +129,7 @@ strip = true
 panic = "abort"
 
 [patch.crates-io]
-# parking_lot_core = { git = "https://github.com/youknowone/parking_lot", branch = "rustpython" }
+parking_lot_core = { git = "https://github.com/youknowone/parking_lot", branch = "rustpython" }
 # REDOX START, Uncomment when you want to compile/check with redoxer
 # REDOX END
 
@@ -297,10 +298,12 @@ strum_macros = "0.28"
 syn = "2"
 syn-ext = "0.5.0"
 system-configuration = "0.8.0"
+tcl-sys = { git = "https://github.com/arihant2math/tkinter.git", tag = "v0.2.0" }
 textwrap = { version = "0.16.2", default-features = false }
 termios = "0.3.3"
 thiserror = "2.0"
 thin-vec = "0.2.14"
+tk-sys = { git = "https://github.com/arihant2math/tkinter.git", tag = "v0.2.0" }
 icu_casemap = "2"
 icu_locale = "2"
 icu_properties = "2"