emacsify denote bindings and add 0x0 support without package

- map denote bindings to C-c iso <leader> prefix
- replace 0x0 package with 2 functions from @daviwil

init.org

@@ -3226,12 +3226,39 @@ Configures the ~0x0~ package for easily sharing code snippets and files:
 #+BEGIN_SRC emacs-lisp
   ;; configure 0x0
   (use-package 0x0
+    :disabled
     :ensure t
     :config (setq 0x0-use-curl t))
+
+  (defun 0x0-upload-text ()
+      (interactive)
+      (let* ((contents
+              (if (use-region-p)
+                  (buffer-substring-no-properties (region-beginning) (region-end))
+                (buffer-string)))
+             (temp-file (make-temp-file "0x0" nil ".txt" contents)))
+        (message "Sending %s to 0x0.st..." temp-file)
+        (let ((url (string-trim-right
+                    (shell-command-to-string
+                     (format "curl -s -F'file=@%s' -Fsecret= -Fexpires=24 https://0x0.st"
+                             temp-file)))))
+          (message "Yanked ‘%s’ into kill ring." url)
+          (kill-new url)
+          (delete-file temp-file))))
+
+    (defun 0x0-upload-file (file-path)
+      (interactive "fSelect a file to upload: ")
+      (message "Sending %s to 0x0.st..." file-path)
+      (let ((url (string-trim-right
+                  (shell-command-to-string
+                   (format "curl -s -F'file=@%s' -Fsecret= -Fexpires=24 https://0x0.st"
+                           (expand-file-name file-path))))))
+        (message "Yanked ‘%s’ into kill ring." url)
+        (kill-new url)))
 #+END_SRC
 
 #+RESULTS:
-: [nil 26279 35497 183387 nil elpaca-process-queues nil nil 963000 nil]
+: +0x0-upload-file
 
 The commands this package offers: