Ben kısayol ekledim.

You don’t need to say Ben. The verb ending in ekledim already shows the subject is “I.”

• Kısayol ekledim. = “I added a shortcut.” (most natural)
• Use Ben for emphasis or contrast: Ben kısayol ekledim (It was me who added a shortcut, not someone else).

In Turkish, a direct object gets the accusative only if it’s definite/specific.

• Indefinite: Kısayol ekledim. = “I added a shortcut.” (no suffix)
• Definite: Kısayolu ekledim. = “I added the shortcut.” (accusative -u, due to vowel harmony)

Both are correct:

• Kısayol ekledim. = “I added a shortcut.” (neutral, very common)
• Bir kısayol ekledim. = often highlights quantity (“one”), newness, or contrast.
  Use bir when you want to stress “one” or when counting: Bir/iki kısayol ekledim.

It’s root + tense + person: ekle- (add) + -di (simple past) + -m (1st person singular) → ekledim.

• The past suffix -di/-dı/-du/-dü (or -ti/-tı/-tu/-tü after voiceless consonants) changes by vowel harmony and consonant voicing.
• Because the last vowel of ekle- is front (e), you get -di → ekledi-, then -m → ekledim.

Insert the negative -me/-ma before the tense: ekle-me-di-m → eklemedim.

• Kısayol eklemedim. = “I didn’t add a shortcut.”
• Definite object stays definite: Kısayolu eklemedim. = “I didn’t add the shortcut.”

Use the question particle mi/mı/mu/mü, which follows the verb and obeys vowel harmony.

• “Did you add a shortcut?” → Kısayol ekledin mi?
• “Did I add a shortcut?” → Kısayol ekledim mi?
  Note: mi is a separate word after verbs (no personal ending on it in this case).

Yes. Turkish is flexible, but the verb is usually last.

• Neutral: Ben kısayol ekledim.
• Focus on the object’s definiteness: Kısayolu ben ekledim. (“It was I who added the shortcut.”)
• Avoid putting the verb in the middle in neutral statements: Ekledim kısayol sounds odd.

Use the dative -a/-e on the place you’re adding to:

• Uygulamaya kısayol ekledim. (I added a shortcut to the app.)
• Menüye kısayol ekledim. (note the buffer -y- after a vowel)
• Ana ekrana / masaüstüne kısayol ekledim.

Write it as one word: kısayol.

• It comes from kısa (short) + yol (way), fused into a compound noun.
• Especially in computing, kısayol is the standard form.

The Turkish ı is a back, unrounded vowel; think of the relaxed vowel in the second syllable of “roses” or a short “uh.”

• kısayol ≈ [kɯ-sa-yol]
• ekledim ≈ [ek-le-dim]
  Stress tends to fall near the end of words: kısayól, ekledím.

Yes:

• kısayol eklemek: add a shortcut (often “to” somewhere: menüye, ekrana)
• kısayol oluşturmak: create a shortcut (emphasizes making one, not necessarily where)
• ilave etmek is a more formal synonym of eklemek in general contexts.

eklediğim is a participle meaning “that I added.” It modifies a noun:

• eklediğim kısayol = “the shortcut that I added”
  In a full clause with a finite verb you use ekledim: Ben kısayol ekledim.

Use the clitic de/da (written separately, vowel harmony applies to the vowel only):

• Ben de kısayol ekledim. = “I also added a shortcut.” (I, too)
• Kısayol da ekledim. = “I added a shortcut as well.” (in addition to something else)